For both front and rear bags, you will start by looking for the black nylon/cordura flap. This flap will have white stiches running along both sides. Note that the flap is actually two pieces of nylon/cordura which are sewn together. These two pieces must be separated at the end where there are no stitches in order to insert a funnel or other filling device.
Hold the bag so that the flap is pointed straight up and fill half way. Using a blunted rod and alternating between filling and packing, begin packing the sand firmly into the bag until the shape is uniform and you are satisfied with the firmness. Slam the base of the bag firmly on the bench several times to compact and evenly seat the sand. Then, check to see if more sand needs to be added. Repeat this process for the ears if you are filling a rear bag. Note that as the sand continues to condense during use, the bag may occasionally require additional sand until it reaches maximum capacity.
WHEN YOU ARE DONE FILLING
Tuck the flap into the slot directly underneath itself by creating a "U" shape with the flap and pushing it into the slot. The flap has a built-in tab which makes it easy to insert a blunt tool as an aid to push the flap into the slot. Repeat this process for the ears.
Simply tuck the flap under the bag and insert it into your rest. You may apply a small, thin piece of tape to hold the flap in place under the bag.